Palafoxia. COMPOSITE. 337- 



involucre oblong-lanceolate, in 2 series : rays 20 or 30, yellow : scales of the pap- 

 pus fimbriate-lacerate. Pacif. R. Rep. vi. 76, t. 12. 



Var. Larseni, with tufted stems leafy almost to the head. 



Crater Pass, Oregon, lat. 44, Newberry. The variety on Lassen's Peak, Bolander and 

 Larsen. 



6. H. vestita, Gray. White- woolly when young ; the scapes soon naked and 

 glandular : leaves obovate or spatulate, tapering into a short petiole, entire or nearly 

 so : scales of the involucre linear or lanceolate, in 2 or 3 series : rays 20 to 30, yel- 

 low : scales of the very silvery and conspicuous pappus erose-toothed, the two 

 longer ones oblong and equalling the proper tube of the corolla, the alternate ones 

 shorter as well as broader and truncate. Proc. Am. Acad. vi. 547. 



On a volcanic hill south of Mono Lake, at the height of 9,000 feet, Brewer. Leaves an inch or 

 so long, very white with the floccose wool, which may be deciduous. Head an inch high at 

 maturity. Rays barely 3 lines long. 



75. RIGIOPAPPUS, Gray. 



Head rather many-flowered, with 5 to 1 2 pistillate rays ; all the flowers fertile. 

 Involucre a single or somewhat double series of rather rigid herbaceous subulate- 

 linear erect scales, similar to the uppermost leaves, at length concave and half 

 embracing akenes. Receptacle flat and naked. Rays not exceeding the disk, the 

 oblong entire or 2-toothed ligule not longer than its tube : disk-corollas slender and 

 with 3 to 5 short erect teeth. Style-branches of the disk-flowers with short and flat 

 linear stigmatic portion, tipped with a longer slender-subulate hispid appendage. 

 Akenes linear, slender, compressed, minutely rugose, sparsely hirsute, those of the 

 disk more or less 4-angled. Pappus of 4 or 5 rigid and wholly opaque subulate 

 awn-shaped scales, as long as or surpassing the corollas, or in the ray one or two 

 much shorter. A single species. 



1. R. leptocladus, Gray. Slender annual, a span to a foot high or more, mi- 

 nutely hairy and roughish, with narrow linear alternate entire leaves, and corymbose 

 or paniculate filiform branches, inclined to be long and naked, terminated by small 

 heads of inconspicuous flesh-colored or purplish flowers. Proc. Am. Acad. vi. 548 ; 

 Benth. & Hook. Gen. PI. ii. 406. 



Dry ground in the foot-hills, both of the Coast Range (Napa Co., &c.) and of the Sierra Nevada ; 

 extending into Oregon (where it was first collected by Dr. LyalT) and Nevada. 



76. PALAPOXIA, Lagasca. 



Head 10- 30-flowered; the flowers all perfect and tubular (but the marginal 

 sometimes with enlarged and irregular ray-like corollas, and in one eastern species 

 with pistillate 3-cleft rays). Involucre campanulate or turbinate ; the scales niem- 

 branaceous or herbaceous, in one or two series. Receptacle flat and naked. Corolla 

 various; the lobes usually long and narrow. Style-branches filiform, minutely 

 glandular-hirsute. Akenes 4-5-angled, linear or elongated-obpyramidal. Pappus 

 of 4 to 12 hyaline chaffy scales traversed by a strong midrib, commonly shorter 

 and blunter in the outermost flowers (rarely nearly wanting). Herbs, or some- 

 times shrubby, roughish-pubescent or scabrous, and mostly glandular above ; with 

 narrow alternate and entire 1 - 3-nerved leaves, and small or middle-sized solitary or 

 loosely corymbose heads of rose-colored or flesh-colored flowers. 



A small genus confined to the southern borders of the United States and to Mexico, polymor- 

 phous as to the corollas, which in all the eastern North-American species have a campanulate 



